A favorite of the newlywed's long before her North American visit, Kate has worn the shade three times on her trip so far – throwing in a lighter shade of blue, too.

While preparing for takeoff on Thursday, Kate played the part of chic traveler in a Roland Mouret dress topped with a tailored blazer by Smythe Les Vestes. Changing en route, she deplaned in a lacy navy and white number by Canadian-born designer Erdem Moralioglu.